Need Help... something attaching to corals rocks sand and glass

[Dj Emcee]

I moved a coral and saw some red slime. I left it alone figuring my snails and stellar water parameters would correct it. Come to find out my water is not that pristine. I think im having a diatom attack. Can you guys help me identify this and cure the issue. It seems to be attacking my stoney and leathers especially. The tank is two years old. Though it’s actually 8 months because i moved, but it was originally set up and cycled two years ago, if that makes sense. Anyway, coraline and chateo is growing heavily. So I have a refugium. Alk 8.9 Cal 460 Salinity 1.25 Mag 1400 No3 0 to .02 PH 8.2 Phosphates 1.1 . That may be the problem but stoneys grow fine with that phosphate number. Or is it because my nitrates are too low? What do I do people, please help? Attached are videos and photos.

 

[PBnJOnWheat]

I moved a coral and saw some red slime. I left it alone figuring my snails and stellar water parameters would correct it. Come to find out my water is not that pristine. I think im having a diatom attack. Can you guys help me identify this and cure the issue. It seems to be attacking my stoney and leathers especially. The tank is two years old. Though it’s actually 8 months because i moved, but it was originally set up and cycled two years ago, if that makes sense. Anyway, coraline and chateo is growing heavily. So I have a refugium. Alk 8.9 Cal 460 Salinity 1.25 Mag 1400 No3 0 to .02 PH 8.2 Phosphates 1.1 . That may be the problem but stoneys grow fine with that phosphate number. Or is it because my nitrates are too low? What do I do people, please help? Attached are videos and photos.

Bump not too sure. The first photo reminds me of dinos but 1.1 phosphate is pretty high. I’d try and get your nitrates up and phosphates down. 16:1, redfield ratio.

 

[Randy Holmes-Farley Verified Community Expert]

Can't tell from the photos, but diatoms are not red. Red slime is cyanobacteria.